OBSERVATION OF REMOTE AND RECENT THERAPEUTIC EFFECTS OF ACUPOINT-THREAD EMBEDDING, WESTERN MEDICINE OR ALLIED THERAPY ON PERENNIAL ALLERGIC RHINITIS

Objective: The comparison of the remote and recent therapeutic effects on perennial allergic rhinitis was carried on among single application of acupoint-thread embedding, western medicine (certirizine+flixonase) and allied therapy. Method: Ninety cases were randomized into thread-embedding group, western medicine group and embedding+western medicine group (allied-therapy group), 30 cases in each one. In thread embedding group, Yingxiang (迎香 LI 20) and Feishu (肺俞 BL 13) were selected for thread embedding, once a week, totally 4 treatments were required. In western medicine group, certirizine tablet 10 mg in combination with flixonase sprayer was applied once per day, continuously for 30 days in treatment. In allied-therapy group, both of the above methods were adopted continuously for 30 days in treatment. The therapeutic effects were in statistics at the end of treatment and 1 year later. Results: At the end of treatment, in thread-embedding group, 21 cases were remarkably effective, 3 cases effective and 6 cases no effect. In western medicine group, 20 cases were remarkably effective, 3 cases effective and 7 cases no effect. In allied-therapy group, 23 cases were remarkably effective, 2 cases effective and 5 cases no effect. It was shown in statistics that there was no significant difference in therapeutic effects among three groups ( P>0.05 ). But one year after the end of treatment, it was indicated that in thread-embedding group, 3 cases were remarkably effective, 10 cases effective and 17 cases no effect; in western medicine group, 2 cases were remarkably effective, 9 cases effective and 19 cases no effect; in allied-therapy group, 7 cases were remarkably effective, 11 cases effective and 12 cases no effect. The significant difference in the therapeutic effects had not been presented in the comparison between thread-embedding group and western medicine group (P>0.05), but that had been presented between allied-therapy group with either of the groups with single therapy applied (P<0.05). Conclusion: Quite good recent therapeutic effect of either acupoint-thread embedding or western medicine (certirizine+flixonase) was achieved on perennial allergic rhinitis. The remote therapeutic effect of allied therapy was more advantageous than that of single application of either thread embedding or western medicine.

Effect of Chitosan Coating on the Properties of Poly(glycolic acid-lactic acid)Thread-Embedding Material

Poly( glycolic acid-lactic acid)( PGLA) threadembedding material was modified by chitosan coating which could improve the rigidity,hydrophilicity and moisture absorption of the material,and produced better stimulation effect. Thus,this kind of thread-embedding materials which can be buried into acupuncture points to produce a long-time stimulation is popular in the acupuncture and moxibustion therapies. The variation tendencies of diameter,weight, hydrophilicity, and flexibility of the samples under the change of chitosan coating concentration,coating time and coating times were studied respectively. The results showed that the hydrophilicity,weight,and rigidity after coating rose in a certain range with the increase of coating time,coating times and coating concentration. The coating time had little influence on the diameter of fiber.

Effect of Chitosan Coating on Properties of Polyactic Acid Thread-Embedding Material

Thread-embedding materials buried into acupuncture points to produce a long-time stimulation is a method which has been widely applied in the acupuncture and moxibustion therapies for diseases treating and they should have excellent properties of good biocompatibility,biodegradability and moderate rigidity.Polyactic acid(PLA) as the thread-embedding material had some shortcomings such as poor hydrophilicity and slowly biodegradable speed.In this paper,PLA thread-embedding material was modified by chitosan coating which could improve rigidity,hydrophilicity and moisture absorption and thus produce better stimulation effect.The variation tendency of diameter,mass,hydrophilicity,and initial modulus of the sample under the change of chitosan coating concentration,coating time and coating times were studied respectively.The results showed that the hydrophilicity,mass,and initial modulus after coating rose in a certain range when the coating time,coating times and coating concentration increased,while the changing of coating had little impact on fiber diameter.

Clinical study on the treatment of bronchiectasis in remission period by embedding thread combined with Jianpi Qushi Huayu plaster

Objective:To explore the clinical effect of embedding thread combined with Jianpi Qushi Huayu ointment in the treatment of bronchiectasis in remission period,and to observe the effect on the level of inflammatory cytokines.Methods:150 patients with bronchiectasis in remission period were divided into three groups(50 cases in each group),western medicine group(treated with salmeterol fluticasone and low dose erythromycin),combined group(treated with Jianpi Qushi Huayu plaster),observation group(treated with western medicine+Jianpi Qushi Huayu plaster+embedding thread),and the clinical treatment of the three groups were compared.Result:before and after treatment,the improvement of TCM syndrome score,the improvement of pulmonary ventilation index,the improvement of inflammatory cytokines,and the change of adverse reactions.Results:the treatment efficiency of the observation group and the combination group was significantly higher than that of the western medicine group P The peak level of expiratory flow velocity,the maximum expiratory flow,the forced expiratory volume in one second and the ratio of forced expiratory volume in one second to vital capacity in the observation group and the combined group were significantly better than those in the western medicine group and the pre-treatment level(P<0.05),and the improvement in the observation group was better than that in the combined group After treatment,the expression of IL-13,IL-10 and IL-4 in the combined group was significantly better than that in the western medicine group and before treatment(P<0.05),and the improvement in the observation group was better than that in the combined group;there was no significant difference in the incidence of adverse reactions among the three groups(P>0.05).Conclusion:catgut embedding combined with Jianpi Qushi Huayu ointment can significantly alleviate the related clinical symptoms and signs,effectively control the further aggravation of the disease,improve the lung function of patients,regulate the level of inflammatory cytokines to reduce the degree of inflammatory reaction,and do not significantly aggravate the adverse reactions of drugs.

基于RT-Thread的液压支架监控分站的设计

为提高煤矿生产的安全性和效率,降低生产成本,设计了基于嵌入式实时操作系统RT-Thread的液压支架监控分站。该分站通过CAN总线将综采工作面液压支架的工作数据上传到主站并接收主站下达的指令;此外,通过支架控制器可以实现对液压支架的远程控制。软件设计利用信号量和事件集进行线程间通信同步;同时采用多线程优先级抢占调度机制,实现任务的并发运行。实验证明,该分站具有精度高、可靠性强和实时响应等特点,达到工程实际应用需求。

Pull-out Behaviour of Axially Loaded Screwed-in Threaded Rods Embedded in CLT Elements: Experimental Study

Experimental investigation on the pull-out behaviour,including the withdrawal capacity,slip stiffness and inter-facial shear stress,of axially loaded screwed-in threaded rod embedded in cross laminated timber(CLT)was con-ducted.Specimens with varying embedment length and different number of threaded rods were tested in this study.To prevent premature splitting failure of timber,some specimens were reinforced in the direction perpen-dicular to the timber grain with self-tapping screws.Test results showed that the screwed-in threaded rod con-nections exhibited good pull-out behaviour with high withdrawal capacity and slip stiffness.Within a certain range,the withdrawal capacity increases considerably with the increase of embedment length,while the average interfacial shear stress shows the opposite tendency.The self-tapping screws played an important role on reducing the splitting of the timber and improving the withdrawal capacity and slip stiffness of the screwed-in threaded rod.Additionally,for the specimens with self-tapping screw reinforcements,the improvement of withdrawal capacity and stiffness when increasing the number of threaded rods are much more obvious than that of the speci-mens without the self-tapping screws,due to the change of failure modes.

Roller Screw and Threaded Chain Speed Reducer: An Experimental Evaluation

We are developing a speed reducer that can be considered a transformation of a worm gear reducer: the worm is replaced by an inverted roller screw, and the gear is replaced by a threaded chain drive. This configuration lessens wear, increases load capacity, and improves efficiency. The threaded chain consists of nut-shaped links. This paper presents the results of tests carried out on a prototype with a reduction ratio of 46.

基于RT-Thread的可信软件栈的设计和实现

针对基于Linux和TCG软件栈(Trusted computing group Software Stack,TSS)的复杂性问题,提出一种轻量级的可信软件栈。分析了TSS的基本结构与TSS在嵌入式系统的局限,总结出基于嵌入式系统的可信软件栈设计需求,设计出软件栈命令调用的机制和软件栈的结构。此外,分析了TSS密钥管理缓存算法,在flash中定义一块密钥槽空间,方便密钥管理中直接访问,阐述密钥生成的逻辑过程,实现面向嵌入式系统的可信软件系统。经实验验证,该软件栈可以结合RT-Thread实时系统实现基本的可信计算功能。

基于RT-Thread的卫星导航控制系统研究

随着制造业的发展,自动引导车被广泛应用于现代工业领域,由于作业环境复杂程度变高,对车辆控制系统硬件的稳定性、灵活性,软件系统的实时性、模块化程度有了更高要求。从自动引导车的需求出发,对导航控制系统的硬件及软件进行了设计,后针对路径规划与路径追踪模块,提出了一种路径规划与追踪控制方法,通过输入不同的横向误差与速度进行指定模糊规则,最终得到合适的预瞄距离,从而使车辆实现自适应预瞄距离的功能,提高车辆的自适应能力。试验结果证明了设计的可行性,为后续自动引导车的控制系统研究提供参考。

基于RT-thread的精确时间同步系统设计

分布式智能采集终端需要一致的时间基准,用于多种数据和事件的时间标记。为满足智能采集终端对高精度时间同步的需求,选择IEEE 1588精确时间同步协议实现时间同步;设计基于纯国产32 bit双核微控制器HPM6750和以太网收发器RTL8211FS(I)-VS的精确时间同步系统,选用国产开源嵌入式实时操作系统RT-thread操作系统,实现在物理层获取时间戳来运行IEEE 1588协议;构建测试平台对该时间同步系统进行主从时钟同步精度测试。测试结果表明,设计在物理层获取时间戳时达到的时间同步精度在±250 ns以内,与在数据链路层获取时间戳时达到±10μs的时间同步精度相比较,有效提高了时间同步精度,可广泛应用于对时间同步精度有较高要求的智能采集终端。

基于 RT-Thread 的玉米对行收获控制系统 研发与测试

为提高玉米机械化收获效率,减轻驾驶员劳动强度,研发玉米收获对行控制系统。该系统包括玉米边界行感知模块和对行控制模块,采用激光雷达获取玉米行点云数据,提出基于STM32处理器和RT-Thread实时操作系统的点云数据快速分析处理方法,实现玉米行边界点的提取,通过边界点计算得到横向偏差;设计系统通信拓扑架构,实现感知、处理、对行控制模块之间的高效通信。对该系统的性能开展田间试验验证,结果表明:收割机与玉米行实际边界线的平均横向偏差为0.06 m,最大横向偏差为0.126 m,满足玉米对行收获作业要求,为玉米对行收获提供一定的参考。

基于RT-Thread的嵌入式识别系统设计与实现

提出了一种使用基于RT-Thread实时操作系统和STM32L431微控制器的嵌入式识别系统。使用VGA摄像头实时的采集被识别物体的图像信息,对采集后的图像信息进行图像预处理;然后使用MobileNetV3模型进行参数训练;最后,在嵌入式终端实现了对图像的推理识别。实验表明,对MobileNetV3模型的验证和在终端进行实物测试的结果性能指标高、响应时间快。

基于RT-Thread的温湿度数据采集监测系统设计

温湿度数据的采集和监测在各行各业中发挥着重要作用。本文基于RT-Thread设计了一个分布式温湿度采集监测系统。该系统以STM32开发板为主控模块,在芯片中嵌入RT-Thread实时操作系统,可实时采集分布式节点的温湿度数据,并通过无线网络将数据上传至OneNET云平台。该系统提高了数据采集的实时性,实现了温湿度数据的可视化显示和远程实时监测功能。

RT-Thread操作系统的电池管理系统设计

为了保证电池在充放电过程中的安全,针对目前电池管理系统存在可移植性差、不便于功能扩展等问题,提出一种智能电池管理系统。系统采用国产嵌入式实时操作系统RT-Thread,并选用STM32作为主控制器芯片,使整个系统的监控、调试更加方便。测试结果表明,该系统可以实时监控电池的充放电过程,预留的接口可以方便以后做功能扩展。

基于D1-H应用处理器的RT-Thread驻留方法

针对实时操作系统复杂性内核导致嵌入式应用程序编译速度慢、可复用性差的问题,提出基于通用嵌入式计算机架构(GEC)的RT-Thread实时操作系统驻留方法。在合理划分存储空间的基础上,通过对中断服务例程进行共享,为用户提供底层驱动与软件应用层的函数调用服务。最后以D1-H应用处理器为例进行RT-Thread驻留测试。实践结果表明,该驻留方法实现了系统内核与应用程序的物理隔离,编译时间更短,开发效率更高,为嵌入式程序开发的时效性、便捷性和简易性提供了应用基础。

RT-Thread和Qt的可视化印花机控制系统设计

为了提高印花机控制系统的自动化水平,针对当前印花机控制系统功能单一、稳定性差、缺少直观的数据显示和命令操作界面等缺陷,提出一种基于上下位机模式的可视化印花机控制方案。该方案采用嵌入式实时操作系统RT-Thread实现下位机模块的任务调度,采用Qt应用程序框架设计上位机的人机交互图形界面,并通过CAN总线连接下位机进行印花电机的监控。实验证明,该方案不仅提高了系统的可靠性和操作的直观性,而且有利于系统的进一步改进与升级。

嵌入式实时操作系统RT-Thread在SEP4020上的移植

文章介绍了嵌入式实时操作系统RT-Thread的特点及体系结构,并具体研究了RT-Thread在以ARM720T为内核的SEP4020嵌入式芯片上的移植方法。同时讨论了RT-Thread系统的设备驱动模型,及应用程序的编写方法。该移植方案已经过多任务应用程序实际测试,系统可靠稳定运行。

MSP432的RT Thread操作系统移植

RT Thread是一个组件丰富、功能强大、可裁剪性好的开源嵌入式操作系统,而MSP432兼具高性能和低功耗优点,在医疗、能源等领域应用广泛,两者结合必将使得开发更加高效、便捷。但是,关于RT Thread向MSP432单片机移植的详细过程尚未有现成方案。为此,本文给出了RT Thread操作系统在MSP432P401R上移植的具体方法,通过剪裁源码、修改配置文件、更改系统时钟等操作进行适配并移植。实验结果表明,RT Thread系统成功移植到MSP432并能正常运行,具备任务管理、调度以及中断及异常管理等功能。

RT-Thread的I^2C总线驱动结构分析、移植及应用

针对RT-Thread操作系统下I^2C总线驱动展开研究,对驱动结构进行介绍与分析。以STM32F407VG上的软件I2C驱动移植为例介绍了驱动移植步骤,并通过STM32F407VG读写24LC02B的实例,详细介绍I^2C编程步骤及技术细节。最后通过实验验证I^2C驱动移植及编程的有效性。实验结果表明,RT-Thread操作系统下的I^2C总线驱动结构简洁,且易于移植及进行程序设计。

基于RT-Thread的无人机数据记录仪设计与实现

随着无人机任务载荷的种类日益增多,功能日益强大,数据记录仪作为记录无人机飞行状态和任务载荷信息的重要航电设备,也面临着数据量增大、工作环境复杂、工作时间长的挑战,设计一种多用途、高可靠、易存取的数据记录仪成为行业发展的必然要求。对传统无人机数据记录仪存在的功耗大、体积大、成本高、存储效率低、实用性差的缺点做出改进:在STM32F4微处理器上移植了RT-Thread嵌入式实时操作系统,以SD卡为存储介质,用Fatfs文件系统进行数据组织,创新地提出了多线程数据缓冲存储策略,并且开发了USB驱动,能够从PC端将数据拷出进行离线分析。最后根据软硬件设计进行了小批量试制,经测试能够实现多通道、大数据流输入环境下的长时间准确存储。